Questions about food being preserved into glass jars, metal cans, or other air-tight containers using a variety of heat treatment steps to ensure an reasonable level of pasteurisation and/or sterilisation

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Why would hot-packed green beans go bad when still sealed?

My hot-packed green beans went bad. They are still sealed, look nice and green. On the bottom there is a white slime. When I opened a jar they smelled terrible. What happened?
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Does glass bottled orange juice taste bad because of leached metals?

I refuse to get glass bottled orange juice any more even when it's on sale because it tastes bad to me. It seems like every glass bottled orange juice I've ever had tastes bad compared to orange ...
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Homemade lemon pancake syrup

I made lemon syrup which contains lemon juice & rind, sugar, butter ,milk and baking soda. I did a pressure bath in jars. It's normal to separate, even in fridge as it did in the jars. Will this ...
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How long is homemade spiced apple cider good for in a sealed Mason canning jar?

I bring the cider to a boil and simmer the spices for 15 minutes. Immediately after, I pour the cider into canning Mason glass jars with the lids that have the button. How long should I expect the ...